Gelco Chimney Repair Nationwide

Gelco Chimney Repair in San Antonio: What to Know First

We repair Gelco chimney systems throughout San Antonio, and most jobs are done in a single visit. Typical Gelco repairs run $350 to $1,800 depending on what’s actually failing, and you’ll get a written price before we touch anything. This page is for San Antonio homeowners with a Gelco chimney who want to know what’s wrong, what it costs, and whether it’s worth fixing now or can wait. Call (254) 276-4116 and we’ll walk you through it.

Call (254) 276-4116

How Gelco Products Fail – and How We Fix Them

Gelco makes solid chimney components, but every line has its weak points. Here’s what we actually see on San Antonio roofs:

• Gelco GCR Series clay flue liners: cracked sections from thermal shock. San Antonio’s temperature swings, especially the 40-degree drops we get in fall, stress clay liners until they split. The telltale sign is fine clay chips in your firebox after a fire. We remove the cracked sections and install a HeatShield resurfacing system or a DuraFlex stainless liner, depending on the chimney’s condition, so you’re not paying for a full rebuild when the rest of the liner is fine.
• Gelco GS Series stainless steel chimney: rust at the seam welds. The GS line uses welded seams, and in San Antonio’s humidity plus our periodic salt-laden Gulf winds, those weld points oxidize before the rest of the pipe. You’ll see reddish staining running down from the seams. We grind back the rust, treat the metal, and seal the seams with a high-temp coating rated for stainless. If the rust has eaten through, we replace the affected sections with either Gelco OEM or equivalent-gauge DuraFlex stainless, whichever is available faster.
• Gelco cap assemblies: missing or damaged spark arrestors. The spark arrestor mesh on Gelco caps is stainless, but the mounting screws are zinc-coated and corrode after a few Texas seasons. When the mesh pulls loose, you get two problems: embers escaping and squirrels or birds using your chimney as a condominium. We replace the arrestor and remount with stainless hardware, and we’ll text you a photo of the chewed-up screen we pulled off before you spend a dollar.
• Gelco mortar mix: premature joint failure. Older Gelco installations in San Antonio often used a mortar mix that expands at a different rate than the brick in direct sun. After a decade of south-facing exposure, the mortar joints start to crumble and spall. The brick itself is usually fine. We cut out the failed joints and repoint with a breathable, flexible mortar that flexes with the Texas heat, not against it.
• Gelco chimney flashing: separation from the roofline. Gelco chimneys installed on newer San Antonio builds in areas like Alamo Ranch and Stone Oak often have pre-formed flashing paired with an adhesive sealant that doesn’t hold up under our UV load. Water works its way in around the base, staining your ceiling and your drywall. We pull the old flashing, repair the affected decking if needed, and install copper or steel step flashing with a mechanical bond, not just caulk.

Our Gelco Chimney Repair Process

Here’s how a Gelco repair works when you call Hadley Chimney San Antonio:

1. 1
   Call and describe what you’re seeing. A live person answers, asks a few pointed questions about your Gelco system, and books a visit. You’ll get a tracked arrival window, not a four-hour guess.
2. 2
   On-site inspection. Our tech arrives, inspects the full run of your Gelco chimney with a camera, and documents everything. You’ll see the damage with your own eyes, usually while we’re still on the roof.
3. 3
   Written diagnosis and price. We explain what’s actually wrong, whether it’s a liner issue, mortar failure, or flashing leak, and hand you a written price for the repair. You decide. No pressure.
4. 4
   Parts decision. We use Gelco OEM parts where it matters for fit and warranty continuity. Where an aftermarket part performs equal or better, like a DuraFlex liner section, we’ll tell you and explain why. You’ll know exactly what’s going in.
5. 5
   Repair and testing. We complete the work, run a smoke or pressure test where the repair warrants it, and then photograph the finished job so you can see what we changed.
6. 6
   Guarantee activated. Every Gelco repair is covered by the 365-Day Done Right Promise. If it fails within a year, we come back and fix it free.

What Gelco Chimney Repair Costs in San Antonio

Most Gelco repairs in San Antonio fall in the $350 to $1,800 range. Here’s the breakdown by job type so you’re not walking in blind:

Call (254) 276-4116 for an exact quote on your Gelco system. Estimates are free, and the price we give you before we start is the price you pay.

Why San Antonio Homeowners Call Hadley Chimney San Antonio for Gelco Work

We’ve been in the chimney business since 2003, and we’re one of the few San Antonio shops that works on Gelco systems routinely rather than treating them as an occasional surprise. Every Gelco repair gets the 365-Day Done Right Promise in writing, and if it fails within a year, the second visit is free. Our techs arrive in a tracked window, in uniform, and they’ll text you photos of exactly what they found before quoting anything. We also install and service DuraFlex liners and HeatShield resurfacing materials, so if the best fix for your Gelco chimney involves one of those systems, we don’t have to bring in a subcontractor. We’re independently owned and part of the Relay Home Co. family, and we operate under The Relay Visibility Guarantee: live arrival times, before-and-after photos, digital invoicing, and a written price on every job, not just the big ones. “See the problem, understand the fix, then decide – that’s how it should work.”

FAQs

• Does Hadley Chimney San Antonio service Gelco chimneys under warranty? We’re an independent Gelco service provider, so we don’t administer Gelco’s warranty. But if your Gelco system has a manufacturer defect, we’ll document it and help you work through the warranty claim. For the repair itself, our 365-Day Done Right Promise covers our work in writing.
• Can you get Gelco replacement parts for my chimney? Yes. We source Gelco OEM parts for repairs where the manufacturer’s fit and warranty history matter, and we use quality aftermarket options like DuraFlex stainless liners where they perform equal or better. We’ll show you the options and the price difference before ordering anything.
• How fast can you repair my Gelco chimney in San Antonio? Most Gelco repairs are completed on the first visit. Weekend and evening slots are available, and you’ll get a tracked window so you know when we’re coming. Call (254) 276-4116 and we’ll find a time that works.
• Should I repair or replace my Gelco chimney system? If the damage is limited to flashing, mortar joints, or a few spalled bricks, repair is almost always the right call and usually costs under $1,000. If the flue liner is compromised across multiple sections or the chimney crown is significantly degraded, replacement pieces give you a longer service life. We’ll show you the camera footage and let you decide.
• What happens if I skip a Gelco chimney repair? Water is the main risk. Failed flashing makes your roof leak, cracked mortar absorbs water into the masonry, and damaged liners expose your home to harmful gases. Small repairs stay small. Ignored repairs become expensive rebuilds. Call (254) 276-4116 and we’ll tell you honestly whether it can wait.

Ready to get your Gelco chimney sorted? Call Hadley Chimney San Antonio at (254) 276-4116 for a free estimate. We answer 24/7 with a live person, not a voicemail loop. You’ll get a straight answer, a written price, and photos of everything we find.

Written by Cory Mitchell, Owner, Hadley Chimney San Antonio at Hadley Chimney San Antonio, serving San Antonio and nearby areas.